The force of gravity pulls everything on the planet toward the center, regardless of how the planet is aligned from a viewer’s perspective in space. The situation described in the video would not result in a plane flying “upside down” because Earth does not have a top or bottom. Instead, it's based on keeping a consistent altitude and direction. Straight-and-level flight doesn't refer to a literal straight line through the air. “It would have to make that kind of flight path on a globe, which is such an absurdity,” the narrator says.īut this line of thinking is nonsense. The narrator describes a hypothetical flight from Portland, Oregon, to Seoul, South Korea, claiming such a trip would require a plane to fly “so far around the Earth that it’s flying downwards, with its nose vertically downwards" and “around the curve of the Earth so that the airplane is now flying upside down.”
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